multi-employer worksite doctrine, rule promulgation, general contractor liability for safety of employees of subcontractor, Field Operations Manual, Romeo Guest, interpretive statement, Rules of Appellate Procedure, N.C. R. App. P. 28(b)(6), N.C. R. App. P. 2, N.C. R. App. P. 37(a), N.C. R. App. P. 28(d)(1)(c), N.C. R. App. P. 10(a), inspection of jobsite by competent person, serious, appeal, standard of review, de novo review for errors of law, substantial evidence, entire record, statutory right, constitutional right, excess of statutory authority, improper procedure, error of law, substantial competent evidence, entire record as a whole, arbitrary or capricious, 29 CFR § 1926.20(b)(2), N.C.G.S. § 95-127(18), N.C.G.S. § 95-127(2), 29 U.S.C. § 654(a)(2)